ESERCIZIO DI INGLESE SU CAN E TO BE ABLE TO

Can or to be able to?

In alcune delle seguenti frasi può essere usato indifferentemente sia could sia was/were able to.
In altre, invece, è accettabile solo was/were able. Scegliete l'alternativa corretta.

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1. I was a long way from the stage. I . . . see all right but I . . . hear very well.
   1.   could / wasn't able to
   2.   was able to / couldn't
   3.   both (entrambe corrette)
2. The police were suspicious at first but I . . . convince them that we were innocent
   1.   could
   2.   was able to
   3.   both (entrambe corrette)
3. . . . you walk or did they have to carry you?
   1.   were you able to
   2.   could you
   3.   both (entrambe corrette)
4. I had no key so I . . . lock the door.
   1.   couldn't
   2.   wasn't able to
   3.   both (entrambe corrette)
5. At five years old he . . . read quite well.
   1.   could
   2.   was able to
   3.   both (entrambe corrette)
6. The swimmer was very tired but he . . . reach the shore before he collapsed.
   1.   could
   2.   was able to
   3.   both (entrambe corrette)
7. When I arrived everyone was asleep. Fortunately I . . . wake my sister and she let me in.
   1.   could
   2.   was able to
   3.   both (entrambe corrette)
8. I knew the town so I . . . advise him where to go.
   1.   could
   2.   was able to
   3.   both (entrambe corrette)
9. When the garage had repaired our car we . . . continue our journey.
   1.   could
   2.   were able to
   3.   both (entrambe corrette)
10. He was very strong; he . . . ski all day and dance all night.
    1.   could
    2.   was able to
    3.   both (entrambe corrette)